214 REPORT—1!840. 
On Warming and Ventilating Buildings. By Mr. Rircute. 
The principal object of this paper was to call the attention of ar- 
chitects to the construction of houses, with a view to a better provision 
for heating and ventilation. The author described the method adopted 
by Sir J. Robison, whose house is warmed by a large supply of air 
heated to 70°, which is allowed to issue directly into the lobby and 
staircase, which it heats to 60° even in the coldest weather. This 
heated air is allowed to enter the sitting rooms freely by concealed 
apertures over the doors, and the vitiated air is carried off through 
openings in the ceilings by separate flues in each room. 
Sir John Robison stated that, with the apparatus in his house, he 
can keep his staircase at a temperature of from 58° to 62°, when the 
current of heated air was only 64° as it issued from the apparatus, and 
that the additional expense caused by his provision for ventilation did 
not exceed 201. 
On Dennett's Rockets for preserving Lives from Shipwreck. 
By Mr. Grime. 
On the subject of this invention various documents were presented, 
and a letter was read from Captain Denham, stating that the range of 
these rockets exceeded that of the mortar by 100 yards, the range of 
the rockets being about 350 yards, while that of the mortar was but 
about 250. 
